package start.demo01.datatype;

import org.apache.commons.beanutils.BeanUtilsBean;
import org.apache.commons.beanutils.ConvertUtilsBean;
import org.apache.commons.beanutils.Converter;
import org.apache.commons.beanutils.PropertyUtilsBean;


import java.text.DateFormat;
import java.text.DateFormatSymbols;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Map;
//map转Bean对象
public class TransTo {
    public static void transMap2Bean(Map<String, Object> map, Object obj) {
        try {
            DateTimeConverter dtConverter = new DateTimeConverter();
            ConvertUtilsBean convertUtilsBean = new ConvertUtilsBean();
            convertUtilsBean.deregister(Date.class);
            convertUtilsBean.register(dtConverter, Date.class);
            BeanUtilsBean beanUtilsBean = new BeanUtilsBean(convertUtilsBean,
                    new PropertyUtilsBean());
            beanUtilsBean.populate(obj, map);

        } catch (Exception e) {

        }
        return;
    }

}
//日期转换器
class DateTimeConverter implements Converter {
    private static final String DATE      = "yyyy-MM-dd";
    private static final String DATETIME  = "yyyy-MM-dd HH:mm:ss";
    private static final String TIMESTAMP = "yyyy-MM-dd HH:mm:ss.SSS";

    @Override
    public Object convert(Class type, Object value) {
        // TODO Auto-generated method stub
        return toDate(type, value);
    }

    public static Object toDate(Class type, Object value) {
        if (value == null || "".equals(value))
            return null;
        if (value instanceof String) {
            String dateValue = value.toString().trim();
            int length = dateValue.length();
            if (type.equals(Date.class)) {
                try {
                    DateFormat formatter = null;
                    if (length <= 10) {
                        formatter = new SimpleDateFormat(DATE, new DateFormatSymbols(Locale.CHINA));
                        return formatter.parse(dateValue);
                    }
                    if (length <= 19) {
                        formatter = new SimpleDateFormat(DATETIME, new DateFormatSymbols(Locale.CHINA));
                        return formatter.parse(dateValue);
                    }
                    if (length <= 23) {
                        formatter = new SimpleDateFormat(TIMESTAMP, new DateFormatSymbols(Locale.CHINA));
                        return formatter.parse(dateValue);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return value;
    }
}
